Pheochromocytoma and Takotsubo’s Cardiomyopathy Requiring Extracorporeal Membrane Support: A Report of Two Cases and Review of Takotsubo’s Cardiomyopathy Subtypes
Pheochromocytoma and Takotsubo’s Cardiomyopathy Requiring Extracorporeal Membrane Support: A Report of Two Cases and Review of Takotsubo’s Cardiomyopathy Subtypes
Pheochromocytoma/Paraganglioma (PPGL) are rare neuroendocrine catecholamine secreting tumours that may vary widely in their clinical presentation. Previous case series describe 12% of PPGL patients initially presenting with cardiac complications. Pheochromocytoma-related Takotsubo’s cardiomyopathy has been well described in the literature and may present with primarily basal dyskinesis (inverted subtype), apical dyskinesis (classic subtype), or global dyskinesis. Basal dyskineses has been more commonly described in pheochromocytoma-related Takotsubo’s cardiomyopathy. We present two cases of severe cardiogenic shock requiring Extra-Corporeal Membrane Support (ECMO) with Takotsubo’s cardiomyopathy secondary to pheochromocytoma at University Health Network, Toronto. In both cases, the pheochromocytoma was incidentally discovered on imaging. Both patients responded favourably to ECMO and alpha-adrenergic blockade with recovery of ejection fraction. Both received adrenalectomy as an outpatient with successful recovery. Although rare, PPGL should be considered in younger patients presenting with severe unexplained cardiogenic shock and Takotsubo’s cardiomyopathy.
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